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Ch 12 questions

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  • 1. Chemistry, The Central Science , 11th edition Theodore L. Brown, H. Eugene LeMay, Jr., Bruce E. Bursten, and Catherine J. Murphy
    • Dana & Michelle Chatellier
    • University of Delaware
    • © Copyright 2009, Pearson Education
    Chapter 14 Chemical Kinetics
  • 2. The rate of a chemical reaction is affected by:
    • the concentration of the reactants.
    • the temperature of the reaction.
    • the presence of a catalyst.
    • all of the above.
  • 3. The rate of a chemical reaction is affected by:
    • the concentration of the reactants.
    • the temperature of the reaction.
    • the presence of a catalyst.
    • all of the above.
  • 4. As a chemical reaction proceeds, the rate of the reaction tends to:
    • increase.
    • decrease.
    • remain constant.
    • oscillate.
  • 5. As a chemical reaction proceeds, the rate of the reaction tends to:
    • increase.
    • decrease.
    • remain constant.
    • oscillate.
  • 6. If tripling the concentration of reactant A multiplies the initial rate of the reaction by nine, the reaction is _______ order in A.
    • zeroth
    • first
    • second
    • third
  • 7. If tripling the concentration of reactant A multiplies the initial rate of the reaction by nine, the reaction is _______ order in A.
    • zeroth
    • first
    • second
    • third
  • 8. A + B  C + D Rate = k [A][B] The overall order of this reaction is:
    • first.
    • second.
    • third.
    • fourth.
  • 9. A + B  C + D Rate = k [A][B] The overall order of this reaction is:
    • first.
    • second.
    • third.
    • fourth.
  • 10. W + X  Y + Z Rate = k [W] The order of this reaction with respect to X is:
    • zeroth.
    • first.
    • second.
    • third.
  • 11. W + X  Y + Z Rate = k [W] The order of this reaction with respect to X is:
    • zeroth.
    • first.
    • second.
    • third.
  • 12. The time needed for half of the reactant to be consumed is called the __________ of the reaction.
    • midpoint
    • equivalence point
    • half-rate
    • half-life
  • 13. The time needed for half of the reactant to be consumed is called the __________ of the reaction.
    • midpoint
    • equivalence point
    • half-rate
    • half-life
  • 14. The half-life of a first-order reaction is equal to _________, where k is the rate constant.
    • 0.693/ k
    • 0.693 k
    • k /2
    • 2 k
  • 15. The half-life of a first-order reaction is equal to _________, where k is the rate constant.
    • 0.693/ k
    • 0.693 k
    • k /2
    • 2 k
  • 16. The minimum energy a collision between molecules must have to produce the products is called the __________ energy.
    • initiation
    • internal
    • external
    • activation
  • 17. The minimum energy a collision between molecules must have to produce the products is called the __________ energy.
    • initiation
    • internal
    • external
    • activation
  • 18. The rate-determining step is the __________ step in a reaction mechanism.
    • first
    • last
    • fastest
    • slowest
  • 19. The rate-determining step is the __________ step in a reaction mechanism.
    • first
    • last
    • fastest
    • slowest
  • 20. A catalyst increases the rate of a reaction by:
    • causing the molecules to move more rapidly.
    • causing the molecules to collide more frequently.
    • lowering the energy of activation.
    • all of the above.
  • 21. A catalyst increases the rate of a reaction by:
    • causing the molecules to move more rapidly.
    • causing the molecules to collide more frequently.
    • lowering the energy of activation.
    • all of the above.